1 // { dg-do run { target c++14 } } 2 3 // Copyright (C) 2013-2018 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License along 17 // with this library; see the file COPYING3. If not see 18 // <http://www.gnu.org/licenses/>. 19 20 // inserters 21 22 // NB: This file is predicated on sstreams, istreams, and ostreams 23 // working, not to mention other major details like char_traits, and 24 // all of the string_view class. 25 26 #include <experimental/string_view> 27 #include <string> 28 #include <fstream> 29 #include <iostream> 30 #include <testsuite_hooks.h> 31 32 // testing basic_filebuf::xsputn via stress testing with large string_views 33 // based on a bug report libstdc++ 9 34 // mode == out 35 void test05(std::size_t size)36test05(std::size_t size) 37 { 38 const char filename[] = "inserters_extractors-2.txt"; 39 const wchar_t fillc = L'f'; 40 std::wofstream ofs(filename); 41 std::wstring str(size, fillc); 42 std::experimental::wstring_view strv(str); 43 44 // sanity checks 45 VERIFY( str.size() == size ); 46 VERIFY( ofs.good() ); 47 48 // stress test 49 ofs << str << std::endl; 50 if (!ofs.good()) 51 VERIFY( false ); 52 53 ofs << str << std::endl; 54 if (!ofs.good()) 55 VERIFY( false ); 56 57 VERIFY( str.size() == size ); 58 VERIFY( ofs.good() ); 59 60 ofs.close(); 61 62 // sanity check on the written file 63 std::wifstream ifs(filename); 64 std::size_t count = 0; 65 wchar_t c; 66 while (count <= (2 * size) + 4) 67 { 68 ifs >> c; 69 if (ifs.good() && c == fillc) 70 { 71 ++count; 72 c = '0'; 73 } 74 else 75 break; 76 } 77 78 VERIFY( count == 2 * size ); 79 } 80 81 int main()82main() 83 { 84 test05(1); 85 test05(1000); 86 test05(10000); 87 88 return 0; 89 } 90